During June 2025, Wang Han contributed to the wanghan79/2025OperatingSystem repository by implementing the Banker's Algorithm in Python to manage resource allocation and prevent deadlocks, directly improving system stability under contention. Their work focused on operating systems concepts, emphasizing algorithm implementation to ensure predictable behavior. Wang Han also addressed repository hygiene by removing placeholder assets and accidental file artifacts, reducing clutter and potential confusion for collaborators. Additionally, they added new visual assets to support documentation and onboarding. The changes maintained code quality with minimal disruption, laying a foundation for future UI and UX enhancements while demonstrating solid technical depth in core system areas.